Weaving device



2 Sheets-Sheei 1 C 3- LONG 7- "JOHNSON N-SWINDELLS rlflmwm ATTORNEYS C. J. LONG El AL WEAVING DEVICE v I Filed March 16, 1958 May 7, 1940.

May 7, 1940. c. J. LONG El AL 2,199,437

WEAVING DEVICE Filed March 16, 1938 2 Sheets-Sheet. 2

c :1 LONG E- U" JOHNSON N-SWINDELLS INVENTORS ATTORNEYS Patented May 7, 1940 UNITED STATES WEAVING DEVICE Charles Jacob Long, Edwin John Johnson, and

Norman Swindells, New London, Comm, as-

signors to Celanese a corporation of Delaware Application March 16,

2 Claims.

Corporation of America,

1938, Serial No. 1 9 6.166

This invention relates to looms for weavingmounting warps as the harnesses can be placed I broken harness, harness cord, cable cord, hook,

wire or when a harness sags or becomes out of alignment for any reason.

An object of the invention is the construction of a stop motion for looms, which stop motion is operated by the harnesses. Qther objects of the invention will appear from the following detailed description and drawings.

In the drawings, wherein like reference numerals refer to the like elements throughout the several views:

Fig. l is a side view of that part of a loom 0ccupied by the harnesses with the harnesses in operative position;

Fig. 2 is a similar view of Fig. l with one harness dropped due to a break in the harness cords; 1

Fig 3 is an end view of Fig. 2; 7

Fig. 4 is a detail view of a stop motion element;

Fig. 5 is a plan view of the stop motion element;

Fig. 6 is a cross-sectional view taken on line 6Ei of Fig. 4, and

Fig. 7 is a cross-sectional view taken on line 'I--l of Fig. 4.

Looms are normally equipped with stop motions responsive to broken warp threads and filling threads. Heretofore, however, no provision was made in looms for stopping the same upon change in position of a harness. Stopping the loom upon such a contingency is of great advantage. For example, when a harness drops it is not always accompanied by the immediate breaking of warp threads which would stop the loom. This dropping of the harness is detrimental since upon the next throw of the shuttle the whole or greater part of the band of warp threads of the fallen harness would be cut out. By employing this invention, however, the moment a harness becomes too low, whether due to a breaking of a support or by reason of poor adjustment, the loom is stopped with the lay in' the back or any desired position.

While accidents of the above nature do not happen frequently, it is estimated that in a shed of looms there are several such accidents a week. It is, therefore, an economy to employ this invention which is simple in construction and inexpensive to construct and operate. The device is also helpful to the warp hanger when on top of the device while fastening them to the harness wires.

In accordance with this invention, there are mounted on the centergirt of the loom or any suitable supporting member or from the floor and under the harnesses a pair of brackets, each containing -a stop motion which operates through a knock-off box to stop the loom. The stop motions are responsive to the position of the harnesses and are operated if a harness wire, a jackback or a harness cable-cord breaks, or if for any reason a harness shaft gets out of alignment or if a harness is not properly leveled.

This invention is applicable to any type of loom that employs harnesses for controlling or shifting the warps. It may be applied to looms which have electrically operated knock-off boxes, or it may be adopted by suitable modification tooperate on looms having mechanical or electrical-mechanical stop motions. The invention is particularly applicable to looms having electrical knock-off boxes as the stop motion, responsive to the harnesses, can be tied right in to the said knock-01f box, thus stopping the 100m in the same manner as when a warp thread or a weft thread is broken.

The invention comprises a bracket I having a slot 2 near one end thereof. The bracket is attached to the center girt or suitable member 4 ofthe loom by means of a bolt 3 passing through the slot 2. The slot 2 is elongated so that the bracket may be adjusted with respect to the harnesses. The bracket I is composed of two members which are substantially at right angles to each other. At the end of the bracket remote from the slot 2 is hinged, as by means of a bolt 5, a movable bar 6. The free end of the movable bar 6 is bent into a U shaped member or tongue I. In its normal position the bar 6 is raised and is maintained in a raised position by means of a spring 8 attached to the bracket I by a screw 9. Mounted in the bracket I is a screw or contact element I I which is insulated from the bracket by means of rubber washer I2. An electrical terminal I 3 connected to a lead wire I4 is fastened to the contact screw II and held in a current engaging position by means of the nut I5. As pressure is applied at the top of the movable bar 6 it is depressed until the edge thereof strikes the contact point or bolt II. In this position an electric circuit is set up through a knock-off box I6. Thiscircuit is completed due to the factthat the knock-off box I6 is grounded to the loom frame.

ill)

The knock-off box may be of any suitable structure and its function is to throw a push rod or knock-off lever to stop the loom. For instance, when the bar 6 has been depressed until it closes the circuit by contact with the screw II it has acted as a switch to close the electric circuit. The knock-off box then acts to operate a solenoid, magnet or similar element to knock off the shipper of the loom.

The knock-ofi box is supported on the loom side and may consist of a die casting consisting of a solenoid so arranged that upon the bar closing the circuit it will raise a bar connecting the solenoid piston with a knock-01f lever and cause the shipper to knock-off by a cam-operated rocker lever, said rocker lever being operated in timed relation to the lay. By adjusting the cam which operates the rocker lever the loom can be stopped in one or more next occurring positions of the lay, preferably on back center. Thus, in the conventional knock-off box the cam on the shaft may be set so that the loom will knock off with the lay in any desired position and With the shuttle in any box. A double cam may be employed which will stop the loom on each pick instead of every other pick or a plurality of cams may be employed such that the loom can be stopped with the lay forward or back or at any desired position. These knock-oil boxes usually operate on an electric current of low voltage, say from to 25 volts, and low amperage with the frame of the loom acting as one part of the circuit. This power may be supplied to the knock-off box through lead-wires l'i coming from a suitable transformer or battery.

Figs. 1, 2 and 3 show the position of the stop motion attached to the center loom girt and relative to the harness shafts I8. The harnesses is are connected to cable cords I!) which in turn are connected to harness wires 2| which harness wires pass over harness sheaves 22. The harnesses are held in a downward direction by means of the springs 23 which are attached to part of the loom frame 24 or to the floor.

When a condition arises such that a harness such as i8 is pulled down by the spring 23 to a position such that it touches the movable bar 6, the electrical circuit is closed and the knock-off box stops the loom. As an illustration reference is had to Figs. 2 and 3 which show the harness cord l9 broken allowing the harness l8 to fall down thus depressing movable bar 6 so that it closes the electrical circuit, which operates the knock-off box to stop the loom.

Having described our invention, it is to be understood that the foregoing detailed description is merely given by Way of illustration and that many variations may be made therein without departing from the spirit of our invention.

What we desire to secure by Letters Patent is:

1. In combination with a loom having harnesses to control the warp, a knock-off box and means for operating said knock-off box to stop the loom, said means comprising a bracket positioned below the harnesses of the loom and having a portion thereof integral therewith and bent at right angles thereto, said portion being adapted to be attached to the loom, a bar pivotally mounted on said bracket, a spring in contact with a free end of said bar for holding said bar in raised position with respect to said bracket, a contact member carried by said bracket and electrical connections to said bar, contact member and knock-off box, the construction and arrangement being such that upon the breakage of a harness cord or wire or upon undue lowering of the harness, said bar is forced under the weight of the harness into contact with said contact member to close the electrical circuit and energize the knock-off box to stop the loom.

2. In combination with a loom having harnesses to control the warp, a knock-off box and means for operating said knock-01f box to stop the loom, said means cmprising a bracket positioned below the harnesses oi the loom and having a portion thereof integral therewith and bent at right angles thereto, said portion being slotted and adapted to be adjustably attached to the loom, a bar pivotally mounted on said bracket, a flat spring attached at one end to said bracket for holding said bar in raised position with respect to said bracket, 2. contact member carried by said bracket and electrical connections to said bar, contact member and knock-off box, the construction and arrangement being such that upon the breakage of a harness cord or wire or upon undue lowering of the harness, said bar is forced under the weight of the harness into contact with said contact member to close the electrical circuit and energize the knock-off box to stop the loom.

CHARLES JACOB LONG. EDWIN JOHN JOHNSON. NORMAN SWINDELLS. 

